The concept of mathematics being purely objective is unequivocally false, and teaching it is even much less so. Upholding the idea that there are always right and wrong answers perpetuate objectivity [sic] as well as fear of open conflict [sic].

I'd certainly love for these people to explain how exactly math being objective is "unequivocally false". I'd like for them to demonstrate how, for instance, if you have 2 apples, then add 2 more apples, the answer can be anything other than 4.